sobotka



(No Model.) 4 sheets-'sheen 1.

J. SOBO'TKA. EMBROIDERING MACHINE.

No. 322,860. Patented July 21, 1885.

l f a4-72407 2M (No Model.) 4 Sheets-sheet 2. J. SOBOTKA. EMBROIDERING'MAGHINB.

No. 322,860. l Patentemuly 21. 1885.

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Patented July 21. 1885'.

N. PETERS. FhnIo-Lilhographor. Wnhlngicm, DJ;

(No Model.) `4 Sheets-Sheet 4.

f'J. SOBOTKA. EMBROIDERING MACHINE.v

Patented July 21, 1885'.

FE l:

NITED STATES PATENT OFFICE.

JULrUs soBorKA, or PLAUEN, (voIG'rLANDJ GERMANY.

EMBROVIDERING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 322,860, dated July 21, 188`5. Application filed December 15, 1884. (No model.) Patented in Canada January 20, 1885, No. 20,927.

y declare that the following is a full, clear, and exact description of the same.

My invention relates and is only applicable to those embroidering-machines in which the embroidery is produced by a gang of needles and a gang of shuttles, each needle and shuttle operating to produce embroidery-stitches by interlocking threads-this is to say, to that well known kind of embroiderymachines using needles and shuttles, to which are also applicable, for example, the inventions covered by the United States Patents Nos. 203,142 and 203,143.

The first part of my invention consists in the arrangement of the parts of an embroidering-machine of the before-mentioned type, constructed in such a manner that only the needle-bar is moved toward and away from the cloth, while in the embroidering-machines using needles and shuttles, heretofore known, other parts-such as for holding and guiding the needle-threads or the thread-bobbinsparticipate also in the reciprocative motion of the needle-bar.

The second part of my invention relates to a mechanism for imparting to the needle-bar the reciprocative motion for moving it toward Aand away from the cloth.

The invention consists, thirdly, in a new mechanism for giving the required intermittent friction to the needle-threads when the stitches are produced.

The fourth part of my invention relates to a mechanism for giving tension to the needlethreads or for pulling the stitches tight.

The fifth part of my invention relates to la device for boring holes into the cloth, which holespform in many cases .parts of the embroidery.

The sixth part of my invention relates to an arrangement for making embroideries with threads of two, three, or four distinct colors without changing the threads in each needle, as has heretofore been necessary.

The accompanying four sheets of drawings show only those parts of the embroideringmachine to which my improvements are applied. All the other parts of the embroideraxis.

.ing-rod ai.

example, the cloth-frame, the pantograph for f governing the same, the shuttles, and the mechanism for imparting motion to the latterare omitted. The embroidering-machine shown in the drawings has two storiesg77 but one story being the mere repetition in regard to its construction of the other story', the new mechanisms are only shown completely in the upper story, and omited nearly entirely in the lower one.

Figure 1 of the drawings is avertical transverse section of the part of the machine embodying my inventiom Fig. 2 is a vertical longitudinal section of the same, and Fig. 3 a horizont-al 'section of the same. Fig. 4t is a front view, being partly in section; Fig. 5, a cross-section; and Fig. 5, the top view, on a Alarger scale, of apart of the device for giving friction to the needle-threads. Fig. 7 is a front view, and Fig.`8 a transverse section, on a larger scale, of the needle-bar.

Similar letters refer to similar parts throughout the several views.

As already mentioned above, I only move the needle-bar A toward and away from the cloth, but not any of the other parts, Vwhich hold and support the needle-threads and act upon the same, as is done at present.

For reciprocating the needle-bar A, the detailed construction of which is given hereinafter, I employ the following mechanism: The needle-bar A is carried by a number of horizontal cylindrical rods, a, at the ends of which are provided, as hereinafter described more particularly,the bearings, in which the needlebar A may be revolved round-its longitudinal The rods ay slide longitudinally in the bearings a', secured upon the transverse beam D, forming part of the frame-work of the embroidering-machine. Each of the rods a is embraced by a ring, a2, rigidly secured thereto, to which is pivoted one end of the connect- The other end of connecting-rod a3 is connected with the end of a lever, c, keyed upon the oscillating shaft b, the latter being supported by the bearings d, secured to the transverse beam D.

The oscillatory motion of shaft b is derived from the rotatory motion of the main or driving-shaft E of the embroidering-machine in the following manner: Upon the driving-shaft E is "keyed a revolving disk,B, provided onits inner loo IOS

side with a cam track or groove, b5, in which is kept the roller b, Figs. l and 2, -turning round a pin traversing the extremity of lever bi, which latter is pivoted at c to the frame C of the embroidering-machine. rlhe groove b is so shaped that the lever b* oscillates in the required manner, and this oscillation of lever b4' is transferred by means of the connectingrod b2 to the lever b. The lever bfis provided with a rectangular hole, in which slides lengthwise the square block bl. The connecting-rod b2 is pivoted to the block bT by means of the pin b3, secured to block bl, and may, therefore,

in consequence of the oscillatory motion of lever b4, freely move up and down.

`It will now be understood that the oscillatory motion of the shaft b causes a reciprocative motion ofthe rods a and the needle-bar A, and that the cam-groove b5 of the disk B must be so shaped as to cause the needles to move toward and away from the cloth as required for the formation of the stitches.

For affording facility to give the needlethreads z the required intermittent tension, I have devised the following mechanism, acting as drag or brake upon the threads: The horizontal angle-iron G, Figs. 4 and 5, is secured to the lugs g5 of the bearings a. Upon the angle-iron G are fastened several-in the present instance three-iron bars, g, Fig. 5, of rectangular cross-section, and two other bars, g', `of

' the same kind, which slide and reciprocate in the intervals of the three bars g, the latter forming the guides for the reciprocating bars g. Upon all the bars g and g are secured, by means of the screws g, small wooden blocks g, one end of which is flat and covered with the piece of fabric y, while to the other semicir cular end x, Figs. 4 and 6, a piece of emerycloth is glued. rlhe blocks g2 are distributed in equal intervals upon the bars g and g, but the round and rough ends .fc of the block g2 upon the bars g are directed opposite to those of the blocks g2 upon the bars g', so that each thread z may receive from both sides the friction, Fig. 6. When the formation of the stitches requires that the threads z pass free between the blocks g2, the latter have such position that the corresponding blocks g2 on all the bars g and g"cover77 one another transversely, and that straight transversal intervals are formed between the blocks. As soon as it is, in the formation of the stitches, necessary to break the thread z, the blocks gAZ of the sliding bars g take such relative position to the blocks g2 of the fast bars g that the round and rough surfaces x of the blocks g2 are pressed against the threads a from both sides and give the threads, which are hereby zigzagged later ally, the required friction, Fig. 6.

"he reciprocative motion of the bars g is produced by the following mechanism: Upon the driving-shaft E ofthe enibroideringmaof the machine, is connected with the extremities of the bars g', so that the latter are moved to and fro, according to the waves upon the side of disk F.

Inorder that the wooden friction-blocks g2 may be easily adjusted upon the bars g and g', each block g2 is provided with a long hole, g4, through which passes t-he screw g3. Before the latter is tightened the block g2 must be placed in its proper position.

As will be recognized by inspection of the Figs. 1, 5, and 6, to the two outerfast bars g are screwed strips of vsheet metal q, provided at the upper edge with rectangular notches, through which the threads z are passed.v

I employ, as heretofore, a wire, h', under which the threads z are led, which wire h', being secured to the outer ends of the oscillating arms H, pulls back intermittently, the needlethreads z and gives them the required tension; but I employ the following` new mechanism for imparting the oscillatory motion to the arms H and to the horizontal shaft h upon which these arms H are keyed: The shaft h oscillates in bearings h2 attached to the bearings a.

Upon the driving-shaft E is keyed a cam, J, upon the periphery of which rests the friction-roller i2, attached to the end of the lever i3, pivoted at i4 to the frame C of the machine. As the lever is connected by means of the connecting-rod i with the lever t', keyed upon the shaft h, the oscillatory motion of the lever will be communicated to the shaft h.

The needle-bar A is constructed in the following entirely new manner, which will clearly be recognized by inspection of the detailed views of Figs. 7 and 8: The cross-section of the needle-bara is nearly rectangular, and resembles that of the cutter-heads of wood-planing machines, Fig. 8, so that several longitudinal edges (four in the present instance) are formed, to which the needles Z may be attached by means of the usual needle-holders, 7c. In this way two, three, or four rows of needles Z may be secured to the needlebar A. `In the present instance only three rows of needles are secured to the needlebar A, Fig. 8, and to the fourth edge of the .bar A are secured small brackets K, into which are screwed the boring points or pins L of the kind well known from the Heilmann Embroidering- Machine.77 Each row of needles Z has threads, which may be of different colors, and each of these rows may, by turning the needle-bar A, be directed horizontally toward the cloth in unlimited alternation, as the pattern of the embroidery may require.

The needle-bar A, resting with its cylindrical parts a in the bearings formed by the heads of the reciprocating rods a, Figs. 7 and 8, may loe turned freely round its longitudinal axis, and can be maintained securely in one of the positions which correspond to the working position of one of the needle-rows or of the row of boring-points L by means of the following mechanism: Upon the end of the nee- IOO IIO

dle-bar A is keyed a disk, o, provided with horizontal holes o', Fig. 7 A cylindrical piu, m', which passes through a hole formed in the lug m of one of the bearings of the needle-bar A,will, by the action of a Hat spring, m3, pressing against the collar m2 of pin m', enter with its outer part one or the other of the holes o. Before the needle-bar A is turned the pin m must be pulled back and out of the-disk o, and when the required row of needles or the row of boring-points is directed toward the cloth S, Fig. l, in the working position, the pinm will enter, under the action of spring ma, a hole o corresponding to the row of needles or boring-points set in working position, so that the latter will be firmly maintained in the desired position. Upon the board N, rigidly secured to the frame of the machine, are placed the thread-bobbins M, which must, in the present instance, have of course thread of; three distinct colors.

The needles Z of the different rows, and also the boring-points L of the needle-bar A, are arranged in transverse planes of A, so that k the guiding-holes of the eye-bar Q, Fig. 1,

placed in the usual manner behind the cloth S, may serve for the needles of the different rows.

All the threads z of the bobbins M are led under the oscillating wire 71, and over the stationary wire h3; but only the threads of the needle-row which is working at the moment are placed between the rough ends .fr of the braking-blocks g2, Figs. 4 and 6. The remaining threads, which are not employed at the moment, are laid in the wire-holders 9", secured to the block g2 of one of the fast rails g, Fig. 5. Vhen a new row of needles is directed toward the cloth S, the t-hreads of the needle-row before employed are not cut off over the cloth, but remain, even after the respective needle-row is turned away from the cloth, in connection with the same ready for a future operation. The threads of the new needle-row are then, as already mentioned, put between the blocks g2, while the threads of the before-employed needle-row are taken out of the intervals of the blocks g2 and put in the holders r, Fig. 4.

The boring-points L, which in the present instance are arranged, as above stated, at one of the four edges of the needle-bar A, but in other cases may also be entirely omitted, are usedy for boring, under the reciprocative motion of the needle-bar A, holes into the cloth S, and which (such bored holes) form in many cases parts of the pattern of the embroidery.

is provided with holes corresponding with the boring-points L, so that said points L can enter these holes during the forward motion of the needle-bar A when piercing the cloth.

b5, connecting-rod b2, block 127, sliding in a rectangular hole of lever b4, and connected with connecting-rod bZ by means of pin b3, lever b', keyed upon shaft b, lever op, connecting-rod a3, ring a2, the cylindrical rods a, carrying the needle-bar A, and the bearings a', as described, for moving the needle-bar A toward and away from the cloth, as specified.

2. In an embroidery-machine using needles and shuttles, the combination of reciprocating rods a with needle-bar A, journaled to said rods, 4and carrying outwardly projectingv needles l, arranged in rows, with the stationary bobbins M, arranged in sets with the respective rows of needles on the needle-bar, and with the stationary bar h? and movable tension-bar h', substantially as specified.

3. The combination of the reciprocating bars g-, sliding between the fast -bars g, attached to the angle-iron G, with the wooden blocks g2; secured upon the bars g and g', one end of the said blocks g2 beingat and covered with a piece of fabric, y, while the other end of the blocks gr2 is circular and covered with a piece of emery-cloth, m, or of other rough material, and with means for reciprocating the bars g', substantially as speeled.

4. The combination of the undulated disk F, keyed upon the driving-shaft E, with lever f pivoted at f, and resting with its roller f against the side of the disk F, and the bars g', provided with blocks g2, having a rounded end covered with emery-cloth, fr, or its equivalent, and placed with their rounded ends alternately with the rounded ends of similar blocks attached to the stationary bars g, substantially as and for the purpose specified.

5. 'Ihe needle-bar A, capable of turning on its longitudinal axis, and provided with two, three, or more rows of needles, Z, as described, in combination with rods a, connecting-rod a3, lever a4, shaft b, and means of oscillating said shaft b, arranged to operatein the man'- ner and for the purpose described.

6. The combination of the needle-bar A with a disk, o, provided with holes o', with the pin m', sliding in a hole of lug m, formed at the bearing of needle-bar A, and the flat spring m3, as described and for the purpose specified.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

Witnesses: JULIUS SOBOTKA.

J oHAN CONRAD DIETRICH, PAUL HERRMANN DInrRrcH.

IOC) 

